Burnish ing-machine



(No Model) 7 sheets-sheet 1 E. CLARK] B'UR NISHING MACHINE.

Patented Nov. 3, 1896;

(No Model.) I 7 Sheets -Shee't 2.

, M.- E. CLARK.

BURNISHING MACHINE.

N0. 570,866. Eaten-ted Nov. 3, 1896.

. 1' 36 I H I r i;

(No Model.) 7 Sheets-Sheet 4.

M. B. CLARK. BURNISHING MACHINE.

No. 570,866. Patented Nov. 3, 1896.

Maid-Wa- (No Model. 7 Sheets-Sheet 5.

M. E. CLARK, BURNISHING MACHINE.

' No. 570,866. Patented Nov. 3, 1896.

O O o 2 m: NORRIS warms to. mowumo. wasumatom o. c.

(No Model.) 7 Sheath-Sheet 6.

M. E. CLARK. BURNISHING MACHINE.

No. 570,866. v Patented N0v..3, 1896..

.(No Model.) 7 Sheets-Sheet '1.

M. E. CLARK. BURNISHING MACHINE.

No. 570,866. Patented Nov. 3, 189 6.

m: NORRIS PETERS 50.. mom-uma. WASHINCITUN. a. c.

UNITED STATES PATENT OFFICE.

MERRILL E. CLARK, OF \VORCESTER, MASSACHUSETTS.

BURNIISHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 570,866, dated November 3, 1896.

To all whom, it may concern/.

Be it known that I, MERRILL E. CLARK, a citizen of the United States, residing at IVorcester, in the county of Vorcester and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Burnishing-Machines, of which the following is a specification.

The purpose of my invention is to devise a burnishing-machine in which stock of various shapes and curvatures may be successfully treated, and which is particularly adapted to burnish such irregular forms as bicycleframes, which have heretofore been finished largely by hand. This I accomplish without rotating the stock being treated by an arrangement of pulleys carrying burnishingbelts and mounted upon a movable plate actuated by suitable mechanism, so that the burnishing-belts may be brought in contact with every portion of the surface to be treated.

In the accompanying drawings, Figure 1 is a front view of the casing of the machine, showing the driving pulley, the controller, and the burnishing-belts. Fig. 2 is a side view of the operating parts of the machine, the casing being broken away, and

shows the several parts in their initial positions when the machine is not in operation. Fig. 3 is a similar view showing the pulleys in one position when the machine is in operation and a section of stock being operated upon. The reverse position when'the machine is in operation is similar to this, the pulley-plate being swung to the opposite eX- treme. Fig. 4 is a section on the line 4 4, Fig. 2, looking in the direction of the arrow, showing particularly the means for operating the pulleys which drive the burnishing-belts. Fig. 5 is a section through line 5 5, Fig. 2, looking in the direction of the arrow, showing particularly the connection between the controller and the clutch mechanism by means of which the machine may be thrown into and out of operation. Fig. 6 is an enlarged view of mechanism for controlling the operation of the burnishing-belts, with such parts broken away as are necessary to show the operation of the device in which the stock being treated may be supported. Fig. 7 is a plan View of the parts shown in Fig. (5, and discloses the duplicate arrangement of the Application filed January 7, 1896. Serial No. 574,610. (No model.)

pulleys governing the burnishing-belts and actuating mechanism therefor, as well as the framework supporting these parts. Fig. 8 is a section through the line 8 8, Fig. 6, omitting the supporting device, looking inthe direction of the arrow, showing the frame of the machine, the ring affording a bearing for the movable plate to which the pulleys are attached, and the means for connecting these several parts. Fig. 9 is a feeding device, which may conveniently be used, and it is shown bolted to the frame of the machine. Fig. 10 is a modification showing means by which motion may be communicated to the movable pulley-plate. Fig. 11 is a sectional View through the line 11 11, Fig. 10, looking in the direction of the arrow. Fig. 12 is a modification in which buffing-pads are used as burnishers in place of the burnishing-belts. In the drawings, A is the casing of the machine, consisting of an upper and lower part, conveniently divided. and provided with suitable framework for supporting the operating parts, as indicated in Figs. 2 and 3. The upthe operating parts of the machine may be exposed when necessary.

B is the driving-pulley, which may receive power in any convenient manner.

0 is the controller, so called, by means of which the burnishing-belts are brought into contact with the work and the supporting device is operated, and may be conveniently manipulated by the foot of the operator.

D is the main shaft, which runs through the casing and is mounted in suitable boxes.

\Vithin the casing of the machine and mounted upon the shaft D are the two pulleys 1 2, which are connected by belts 51 52 with the pulleys 3 4:, mounted upon the shafts 5, which have proper hearings in the arms 6 7, said arms being pivotally mounted upon the shaft D and held in position by the springs 8, secured to the casing of the machine, for a purpose hereinafter to be explained.

Mounted upon the shafts 5 are the pulleys 9 10, from which the belts 61 62 run over the idlers 11 12 and over the small pulleys 13 14 and their duplicates on the opposite side of the movable plate. It may be remarked here that only one side of the machine is shown in Figs. 2 and It will be noticed, however,

per part is a hood, hung on hinges so that from the other drawings that some of the parts and the burnishing-belts are in duplicate.

The belts may be run contin uously,whether v with. which they revolve, and connected by the arms 20 with the movable plate 27, to which the pulleys 1.3 14 and their duplicates are attached.

The movable pulley-plate 27 has a rotating motion within a bearing-ring 28, which is secured in place within the frame of the machine by means of the screws 29.

Upon comparing Figs. 2 and 3 the different positions will. be noted of the eccentrics 23 24, the former showing their positions when the burnishing-belts are not in operation and the latter their positions when the burnishing-belts are in operation.

30 31 (best seen in Fig. 6) are two tong-like arms pivoted at 32 and connected at their bases by the links 33 34 and by the pin 35 with the arm 36, which may have a reciprocating motion in the slot 37 The arm 36 is connected with the lever 38, Figs. 2 and 3, which is operated by the rod 39, which is connected with the arm 40, Fig. 5, upon the controller-rod 41 in such a manner that when the controller (l is moved up and down the tongarms, which aiford a suitable support for any article being burnished, may be opened and closed.

The clutch device, by means of which the sprockets l6 and 19 are connected and which is operated by the controller-rod 41, is shown in Fig. 5, in which 42 is an arm rigidly c011- nected with the controller-rod 41. Rising from it and connected with it is the curved arm 43, with the bent portion 44 affording a shoulder against which the hinged arm 45 may have a bearing, and as the latter revolves with the sprocket-wheel 19 it strikes the shoulder 44, when the rod 43 is elevated and withdraws the pin 95 from a socket in the sprocket-wheel 16, so that motion is not communicated to the sprocket-wheel 20, uponshaft 21 and the'eccentrics 23 24 connected therewith, and the parts are so timed that the clutch is disengaged only when the pulleys 13 14 are in their initial positions, as indicated in Fig. 2, and at the same time the tongarms 30 31 are opened so that the work may be easily removed from the machine. This may be done at the will of the operator and whenever desired, inasmuch as the sprocket 10 moves, say, one hundred and thirty-three revolutions in a minute, and the pulleys 13 14 may be returned to their initial positions and the work disengaged once during each revolution of the sprocket-wheel 16.

In practice I find it desirable to run the pulley 1 about four hundred revolutions per minute, reducing the speed of the sprocketwheel 16 to about one hundred and thirtythree revolutions per minute, as indicated above.

If desired, I may attach to the frame the feeding device (illustrated in Fig. 9 as bolted to the machine) by means of which stock may be fed to the burnishing-belts. This feeding device may be operated by means of the pul ley 46, mounted on the shaft 47, which,through the gears 48 49, communicates motion to the rollers 50 51, which maybe adjusted by means of the cranks 52 53. The pulley 46 can receive motion from a pulley 87, which may be placed on the end of shaft 17,, which could be extended for this purpose.

I have already explained the way in which motion may be imparted to the plate carrying the rolls 13 14. Other mechanism for accomplishing this result is illustrated in Fig. 10, in which the plate 54 may be substituted for the sprocket 19, and, like it, be connected by suitable clutch mechanism with the sprocket 16. Rigidly connected with the plate 54 is the ec centric 105, which, as it revolves upon the shaft 17, imparts, through the connecting-rod 55, a reciprocating motion to the segment-gear 56, which meshes with the gear 57, secured to the plate on which the pulleys 13 14 and their duplicates are mounted.

The pulleys are not shown in Fig. 10,becau se it is not thought necessary to disclose in this figure any other mechanism than that necessary to effect the swinging motion of the plate to which the pulleys are secured.

It will be noted in Fig. 4 that there is sufficient space between the pulleys 9 and 10 to permit of unshipping the burnishing-belts, which is a convenience.

Providing each burnishing-belt with an independent pulley,while not indispensable to' the working of the machine, is a distinct ad vantage, as any inequality in the length of the belts is thus compensated for, and it will also be noticed, upon referring to Figs. 1 and 4, that there are two burnishing-belts, and it will be found desirable to run them in opposite directions.

It will be noted that it is desirable to have two eccentrics on the shaft 21, and arms connecting them with the movable pulley-plate, in order that the latter may not be caught upon a center and difficulty experienced in returning it to the initial position, and it is necessary to carry the pulleys by the center,in order to treat all points on the circumference of the stock without rotating the latter.

I In the modification illustrated in Fig. 12 I show flexible buffing-pads 106 in place of burnishing-belts. These pads are secured to the outer sides of the pulleys, which are mounted upon the movable plate and which are actuated by belts arranged in precisely the same manner as the burnishing-belts. This device is useful in treating stock in which there are very sharp angles and irregular or ornamented surfaces.

Having described the several parts of the machine, I will now describe its mode of operation.

' The parts being in the position shown in Figs. 2 and 6, the work is placed in the machine by pressing it against the burnishingbelts, which will yield to pressure, as the pulleys 9 and 10 are mounted upon arms 6 and 7, secured to the casing of the machine by the springs 8. The work may be supported between the arms 30 31, and by placing the controller O in the position indicated in Fig. l-the supporting-tongs are closed and the pulleys 13 1a are placed in the position shown in Fig. 3, thereby drawing the burnishing-belts around the work to be treated, and the action of the eccentrics 23 24 swings the pulley-seats to and fro, carrying first one pulley and then the other by the center of the stock being burnished until the entire circumference is treated with out revolving the work, which may be fed along at any desired speed, either by hand or by means of the feed device illustrated in Fig. 0.

The modification shown in Fig. 12 works upon precisely the same principle, the rotating plate bringing the buffing-pads instead of the burnishing-belts into contact with the work.

The supporting device for the work is not indispensable to the successful operation of my machine, and may be dispensed with, but in practice it will be found a great convenience and a very desirable feature of the machine.

By diminishing the size of the pulleys 011 the movable plate stock having sharp angles can be successfully treated.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a burnishingmachine, the combination of a plurality of pulleys mounted upon a rotatable plate, a burnishing-surface adaptt ed to be moved by the rotation of said plate,

mechanism for rotating said plate and for returning it to its initial position, substantially as described.

2. In a burnishing-machine, the combination of a pulley upon a shaft mounted on a swinging arm, a spring supporting said arm, a plurality of pulleys mounted upon a rotatable plate, a burnishing-belt encircling all of said pulleys, mechanism for rotating said plate, and for returning it to its initial position, and mechanism for imparting motion to the pulley on the shaft mounted upon. the swinging arm, substantially as described.

3. In a burnishing-machine, the combina tion of a pulley upon a shaft mounted on a swinging arm, a spring supporting said arm,

tion of a driving-shaft, two swinging arms mounted thereon, each carrying a shaft adapted to receive motion from the first-named shaft, a pulley on each of said last-named shafts, springs for supporting said swinging arms, two pulleys on each of the faces of a rotatable plate, a burnishing-belt encircling the pulley on each of said swinging arms and each pair of pulleys upon the faces of said rotatable plate, and mechanism for rotating said plate and for returning it to its initial position, substantially as described.

5. Ina burnishing-machine, the combination of a driving-shaft, two swinging arms mounted thereon, each carrying a shaft adapted to receive motion from the first-named shaft, a pulley 011 each of said last-named shafts, springs for supporting said swinging arms, two pulleys on each of the faces of a rotatable plate, a burnishing-belt encircling the pulley on each of said swinging arms and each pair of pulleys upon the faces of said rotatable plate, a third shaft adapted through suitable mechanism to receive motion from the driving-shaft, and to transmit motion to a fourth shaft, and two eccentrics mounted on said fourth shaft and arms connecting them with said rotatable plate, whereby the plate may be rotated and the burnishing-belts brought into contact with the work, and the plate returned to its initial position, and the work disengaged from the machine, substantially as described.

6. In a burnishing-machine, the combination of a driving-shaft, two swinging arms mounted thereon, each carrying a shaft adapted to receive motion from the firstnamed shaft, a pulley on each of'said lastnamed shafts, springs for supporting said swinging arms, two pulleys on each of the faces of a rotatable plate, a burnishing-belt encircling the pulley 011 each of said swinging arms, and each pair of pulleys on the opposing faces of said rotatable plate,a sprocketwheel on said driving-shaft, athird shaft provided with a sprocket-wheel, connected with the driving-shaft by a sprocket-chain, a sec ond sprocket-wheel on said third shaft, connected by a clutch mechanism with the other sprocket-wheel on said third shaft, a fourth shaft provided with a sprocket-wheel and adapted to receive motion through a sprocket chain, from a sprocket-wheel on said thirdshaft, two eccentrics loosely mounted on said fourth shaft, and rigidly connected with the sprocket-wheel on said fourth shaft, and arms connecting the eccentrics with said rotatable plate, whereby the plate may be rotated and the burnishing-bclts brought into contact with the work, and the plate returned to its initial position, and the work disengaged from the machine, substantially as described.

7 In a burnishing-machine, the combination of a driving-shaft, two swinging arms mounted thereon, each carrying a shaft adapted to receive motion from the firstnained shaft, a pulley on each of said lastnamed shafts, springs for supporting said swinging arms, two pulleys on each of the faces of a rotatable plate, a burnishing-belt encircling the pulley on each of said swinging arms and each pair of pulleys on the faces of said. rotatable plate, a sprocket-wheel on said drivin g-shaft, a third shaft provided with a sprocket-wheel and connected with the driving-shaft by a sprocket-chain, a second sprocket wheel on said third shaft, connected by a clutch mechanism with the other sprocket-wheel on said third shaft, a fourth shaft provided with a sprocket-wheel and adapted to receivemotion through a sprocketchain from a sprocket-wheel on said third shaft, two eccentrics loosely mounted on said fourth shaft and rigidly connected with the sprocket-wheel on said fourth shaft, and arms connecting the eccentrics with said rotatable plate, feeding mechanism actuated by a pulley on said third shaft, a supporting device for holding the work in contact with the burnishing-belts, a controller-arm and intermediate connecting and operating mechanism, whereby the clutch mechanism and the supporting device may be operated, the burnishing-belts applied to the work, the work released from the supporting device, and the burnishing-belts restored to their initial positions, substantially as described.

8. In a burnishing1nachine, a plurality of pulleys mounted upon a reciprocatingly-rotatable plate, a burnishing-belt encircling said pulleys, mechanism for imparting motion to said belt, and mechanism for rotating said plate, substantially as described.

MERRILL E. CLARK.

"Witnesses C. G. WAsHBURN, R. M. WASHBURN. 

